It seems that there is a way using an IF CONDITION to hide a Column.
How about an IF to hide a full line.
Several lines of distinct items report zero in all their columns.
A calculated field was added to SUM all content from a Line.
I would like to formulate:
If that SUM is 0 (Zero)
Than, Hide the full line.
This would save display space on a Screen ...as well as Page lines printing when PDF is available...or for exporting too.
*see screen sample, 3 empty lines : YC, PR, XXX)
Sum up is made in the last column = 0
Just found out this is already available using :
Data Source : Match All FILTERS.
Calculated field summing all values from "wanted to hide" columns is necessary previously.